The final dimensional region, also known as the Cleft of Dimensions in the SNES, and N-Zone in the Final Fantasy Anthology version. It was created by Enuo during his time in power 1,000 years ago. It consumed Phantom Village at some point, transporting it to the current time period unchanged. There are multiple areas to traverse and many bosses holding the way to Exdeath. The original world was split in two (by splitting the original Crystals) to seal away this dimension.

Beach - much like the shifting sand maze area in Bartz's World. An extra-powerful regular monster is thrown in with a standard complement of enemy encounters here, much like the desert in Bartz's World risked meeting the Dhorme Chimera. At the end of this stretch, Exdeath's generals will appear and taunt the heroes before assigning themselves to the areas ahead.

Phantom Village - the village is frozen and its facilities cannot be used, although there is a pot of healing water available for use. The player is unable to speak with any of the townspeople. There are no random encounters here.

Forest - The area resembles the Great Forest of Moore. Calofisteri, the first boss of the final dungeon, waits in the passage to the next area.

Cave - a short, standard cavern area with many waterfalls. The optional boss Omega wanders here, and will most likely kill an unprepared party with its powerful first attack. A room at the end contains a required boss, Apanda, who is related to Byblos, sealed in a book and has a similar fighting style.

Floating Castle - invisible walkways span between platforms. Both this area and the following have many samurai and ninja enemy encounters.

Dimension Castle - a literal gauntlet of bosses. In the basement is Azulmagia, who controls the save point, a group of mini-bosses named Alte Roite who guard treasure in the cells, and Catastrophe, who appears when the party tries to exit the room. Halicarnassus is the King of Dimension Castle, and meets the party at the top floor. Behind him at the entrance to the Void is Twintania, who has a weakness to the summon Odin when charging up his Giga Flare.

The Void - a series of crystalline platforms floating amid the Void. Gilgamesh is here, having been banished by Exdeath after the party's previous battle with him. He decides not to continue fighting and sacrifices his life to help the party destroy Necrophobe, an optional boss that guards the last save point in the Void. A second optional boss, the incredibly powerful Shinryu, waits in monster-in-a-box here.

The overworld theme for Bartz's World is "Four Hearts". The overworld theme to Galuf's World is "Unknown Lands", and the overworld theme on the Merged World is called "A New World". Final Fantasy V is one of the few early Final Fantasy games where the main theme is not also the overworld theme.